HP 40G Display Numeric view Display Plot view, Specify a 90% confidence interval in the C field

Display Numeric view

Display Plot view

11.Specify a 90% confidence interval in the C: field.

*e,*e,*e, to move to the

C: field

0.9 >(17(5@

12.Display the confidence interval in the Numeric view. Note: The interval setting is 0.5.

>180@

13.Display the confidence interval in the Plot view.

>3/27@

You can see, from the second text row, that the

mean is contained within the 90% confidence interval (CI) of 0.3469814 to 0.8370186.

Note: The graph is a simple, generic bell-curve. It is not meant to accurately represent the t-distribution with 5 degrees of freedom.

9-8 Inference aplet